(a) The average price of brand A is higher than average price of brand B
(b) The price of brand B is more spread out than the price of brand A.
Mean of the distributions
The mean of the distributions for the individual samples is given as;
Mean of Brand A = $50
Mean of Brand B = $40
Standard deviation of the samplesStandard deviation of Brand A = $5
Standard deviation of Brand B = $8
From the mean and standard deviation of the samples we can conclude the following;
The average price of brand A is higher than average price of brand B.The price of brand B is more spread out than the price of brand A.Learn more about standard deviation here: https://brainly.com/question/12402189
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Final answer:
The two true statements are that Brand A's prices are less spread out than brand B's prices (C), reflected in the smaller standard deviation, and that Brand A has a higher average price than brand B (D), as indicated by their respective means.
Explanation:
The question involves comparing means and standard deviations for samples of prices from two different brands of shoes, Brand A and Brand B. To select the two true statements among the given options, we consider the provided statistics for each brand:
Brand A: Mean = $50, Standard deviation = $5Brand B: Mean = $40, Standard deviation = $8Now let's analyze the statements:
A. Brand A has a lower average price than brand B - This statement is false because the mean of Brand A ($50) is higher than the mean of Brand B ($40).B. Brand A's prices are more spread out than brand B's prices - This statement is false as well because Brand A has a smaller standard deviation ($5) compared to Brand B ($8), indicating less spread.C. Brand A's prices are less spread out than brand B's prices - This statement is true, reflecting the smaller standard deviation for Brand A.D. Brand A has a higher average price than brand B - This statement is true as explained earlier.Therefore, the two true statements are C and D: Brand A's prices are less spread out than brand B's prices, and Brand A has a higher average price than brand B.
At a school supply store, binders cost $5 and pencil pouches cost $2. In one day, 42 of these items are sold for total sales of $144. Which system represents this (b represents binders and p represents pencil pouches), and how many binders were sold?
Answer:
Part 1) The system of equations that represent this situation is equal to
b+p=42 and 5b+2p=144
Part 2) 20 binders were sold
Step-by-step explanation:
Let
b -----> the number of binders sold
p -----> the number of pencil pouches sold
Part 1)
we know that
The system of equations that represent this situation is equal to
b+p=42
5b+2p=144
Part 2) How many binders were sold?
we have
b+p=42
p=42-b ------> equation A
5b+2p=144 -----> equation B
substitute equation A in equation B
5b+2(42-b)=144
5b+84-2b=144
3b=144-84
3b=60
b=20 binders
What is the area of the shaded region below? Will mark the brainiest if work is shown.
Answer:
Step-by-step explanation:
Which of the following are true statements? Check all that apply.
Answer:
Your answer is D.
Step-by-step explanation:
Although A and C are also correct, according to a graph using the free online program Desmos
what is the equation of the line shown below? Give your answer in slope-intercept form. (5,4) (-4,-5)
Answer:
y = x - 1
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (5, 4) and (x₂, y₂ ) = (- 4, - 5)
m = [tex]\frac{-5-4}{-4-5}[/tex] = [tex]\frac{-9}{-9}[/tex] = 1, thus
y = x + c ← is the partial equation
To find c substitute either of the 2 points into the partial equation
Using (5, 4), then
4 = 5 + c ⇒ c = 4 - 5 = - 1
y = x - 1 ← equation in slope- intercept form
The final equation is y = x - 1.
To find the equation of the line in slope-intercept form, which is y = mx + b, we need two pieces of information: the slope (m) and the y-intercept (b). First, let's calculate the slope using the two given points (5,4) and (-4,-5).
The formula for slope is:
m = (y2 - y1) / (x2 - x1)
Therefore:
m = (-5 - 4) / (-4 - 5) = (-9) / (-9) = 1
Now that we have the slope, we use one of the points to solve for the y-intercept. By substituting the slope and the coordinates of one of the points into the equation, we get:
4 = (1)(5) + b
4 = 5 + b
b = 4 - 5 = -1
Finally, the equation of the line in slope-intercept form is:
y = x - 1
Can someone help me out?
Answer:
40 degrees
Step-by-step explanation:
A triangle solver tool can find the angle easily. It is 39.8°, which rounds to 40°. Apps are available on some calculators, on the Internet, and for iOS and Android phones and tablets.
___
You may be expected to solve this using the Law of Cosines. If we name the sides ...
a = 1.75b = 3.00c = 2.00the law of cosines tells us the relationship is ...
c² = a² + b² -2ab·cos(θ)
Then the angle is ...
θ = arccos((a² +b² -c²)/(2ab)) = arccos((3.0625 +9 -4)/(2·1.75·3))
= arccos(8.0625/10.5) ≈ 39.838° ≈ 40°
Find all polar coordinates of point P where P = ordered pair 6 comma negative pi divided by 5.
Answer:
P(6,-π/6) = (6, -π/6 + 2nπ) and P(-6,-π/6) = (-6, -π/6 + (2n+1)π)
Step-by-step explanation:
We need to find all polar coordinates of
[tex]P = (6,\frac{-\pi }{6})[/tex]
The polar coordinates of any point can be reresented by (r,Ф)
where
(r,Ф) = (r, Ф+2nπ) where n is any integer and r is positive
and
(r,Ф) = (-r, Ф+(2n+1)π) where n is any integer and r is negative.
So, in the question given, r = 6 and Ф = -π/6
So, Polar coordinates will be:
P(6,-π/6) = (6, -π/6 + 2nπ) where where n is any integer and r is positive
and
P(-6,-π/6) = (-6, -π/6 + (2n+1)π) where n is any integer and r is negative.
Answer:
All polar coordinates of point P are [tex](6,-\frac{\pi}{5}+2n\pi)[/tex] and [tex](-6,-\frac{\pi}{5}+(2n+1)\pi)[/tex], where n is an integer.
Step-by-step explanation:
The given point is
[tex]P=(6,-\frac{\pi}{5})[/tex]
If a point is [tex]P=(r,\theta)[/tex], then all polar coordinates of point P are defined as
[tex](r,\theta)=(r,\theta+2n\pi)[/tex]
[tex](r,\theta)=(-r,\theta-(2n+1)\pi)[/tex]
where n is an integer.
In the given point [tex]r=6[/tex] and [tex]\theta=-\frac{\pi}{5}[/tex]. So all polar coordinates of point P are defined as
[tex](6,-\frac{\pi}{5})=(6,-\frac{\pi}{5}+2n\pi)[/tex]
[tex](6,-\frac{\pi}{5})=(-6,-\frac{\pi}{5}+(2n+1)\pi)[/tex]
Therefore all polar coordinates of point P are [tex](6,-\frac{\pi}{5}+2n\pi)[/tex] and [tex](-6,-\frac{\pi}{5}+(2n+1)\pi)[/tex], where n is an integer.
Your response you have been asked to build a scale model of your school out of toothpicks. imagine your school is 30 feet tall. your scale is 1 ft:1.47 cm. if a toothpick is 6.3 cm tall, how many toothpicks tall will your model be
Answer:
563673773837737477377374
Step-by-step explanation:
JK
Answer:
im not too sure
Step-by-step explanation:
sorry
NEED HELP ASAP 20 PTS PLEASE.
The graph of which is the following rational functions has a hole?
Answer:
see below
Step-by-step explanation:
The denominator quadratic of each of the rational functions has two real roots, so the rational function would ordinarily have two vertical asymptotes. If there is one vertical asymptote, it is because the other one has been canceled by a numerator factor, creating a "hole."
A graph of the first rational function shows it to have only one vertical asymptote, at x=3. The product of zeros of the denominator quadratic is the constant term, -12, so the other denominator zero must be at x=-4. That is where the hole is found. (See the graph in the second attachment.)
_____
Without a graphing calculator, you would determine the zeros of each quadratic, and identify the rational function that had numerator and denominator zeros that were the same.
[tex]f(x)=\dfrac{x^2+5x+4}{x^2+x-12}\\\\=\dfrac{(x+4)(x+1)}{(x+4)(x-3)} \qquad\text{has a common factor in numerator and denominator, a hole}[/tex]
the volume of a sphere is 2,098 pi m^3 what is the surface area of the sphere to the nearest tenth?
1700
146.2
850
26,364
The surface area of the sphere to the nearest tenth is approximately 1700. Therefore the correct answer is option a.1700
To find the surface area of a sphere given its volume, we can use the formulas for the volume and surface area of a sphere:
1. Volume of a sphere: V = (4/3)πr³
2. Surface area of a sphere = A = 4πr²
Given:
V = 2098π
First, solve for the radius r using the volume formula
(4/3)πr³ = 2098π
Divide both sides by π:
(4/3)r³ = 2098
Multiply both sides by (3/4):
r³ = 2098 × (3/4)
r³ = 1573.5
Take the cube root of both sides to find r:
r ≈ 11.52
Now, use the radius to find the surface area A:
A = 4πr²
A = 4π(11.52)²
A = 4π × 132.7104
A = 530.8416π
Now, approximate the value:
A ≈ 530.8416 × 3.1416
A ≈ 1667.5
Rounding to the nearest tenth:
A ≈ 1667.5
Therefore, the surface area of the sphere to the nearest tenth is approximately 1700.
Complete Question:
The volume of a sphere is 2,098 pi m³ what is the surface area of the sphere to the nearest tenth?
a. 1700
b. 146.2
c. 850
d. 26,364
Answer:
1700 m^2
Step-by-step explanation:
Write the equation −2x−4y=−8 in slope-intercept form. Then graph the line described by the equation.
Answer:
y=-1/2x+2 start at y-intercept 2 and go down by 1 and right by 2
Step-by-step explanation:
The slope-intercept form of the equation −2x−4y=−8 is y = 0.5x + 2. Starting from the y-intercept (0,2), the graph of this line is drawn by moving a half unit up and one unit to the right from the intercept.
Explanation:The given mathematical equation is −2x−4y=−8. To convert this equation into slope-intercept form (y=mx+b), we want to isolate y. Start by dividing every term by -4, which simplifies the equation to 0.5x + y = 2. In this equation, the slope (m) is 0.5, and the y-intercept (b) is 2.
To graph this line, start by plotting the y-intercept (b) at the point (0, 2) on the y-axis. The slope (m) is 0.5, which we can interpret as a rise of 0.5 units for every run of 1 unit. So, from the y-intercept, move up half a unit and right one unit to plot your second point. Drawing a straight line through these points will give you the graph of your equation.
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The ratio of jakes money to joes money is 3:5. If joe gives jake $25, they will have an equal amount of money. How much money do they have altogether?
Answer: jake has 75 dollars and joe has 125 dollars
Step-by-step explanation:
3/5 = 75/125
joes gives 25 dollar
75 + 25 = 100
125 - 25 = 100
A container contains 10 diesel engines. the company chooses 8 engines at random, and will not ship the container if any of the engines chosen are defective. find the probability that a container will be shipped even though it contains 2 defectives if the sample size is 8.
The probability that a container with 2 defective diesel engines will be shipped when 8 engines are chosen at random is 1/45, calculated using combinations in Mathematics.
Explanation:The subject of this question is Mathematics, specifically involving probability and combinatorics. A container has 10 diesel engines, with 2 being defective. The company will only ship the container if none of the randomly selected 8 engines are defective. The probability that the container is shipped can be found by considering the number of ways to choose 8 engines that are not defective out of the 10 engines, relative to the total number of ways to choose 8 engines out of 10 without any restrictions. Since there are 2 defective engines, there are 8 non-defective engines in total.
To calculate this, we use combinations: The number of ways to choose 8 non-defective engines from the 8 available is given by 8 choose 8 (which is 1 way), while the total number of ways to choose any 8 engines from the 10 is given by 10 choose 8. The probability is the ratio of these two numbers.
Using the combination formula which is n choose k = n! / (k!(n - k)!), we can calculate:
8 choose 8 = 1 (since 0! = 1 by definition)10 choose 8 = 10! / (8!(10 - 8)!) = 45The probability is therefore 1/45. Hence, the probability that a container will be shipped, even though it contains 2 defective engines, when 8 engines are chosen at random is 1/45.
Graph x^3 - 3x^2 + 2 = 0.1 - x What are the solutions of the equation?
To solve the equation
[tex]x^3 - 3x^2 + 2 = 0.1 - x[/tex], you can use the numerical method such as the Newton-Raphson method to approximate the solutions. The solutions are approximately x ≈ 0.84185 and x ≈ 2.725.
Explanation:To solve the equation
[tex]x^3 - 3x^2 + 2 = 0.1 - x[/tex], we first rearrange it as
[tex]x^3 - 3x^2 + x - 1.9 = 0[/tex]. Then, we can use a numerical method such as the Newton-Raphson method to approximate the solutions. Starting with an initial guess, we can iteratively apply the formula
[tex]x_n+1 = x_n - f(x_n) / f'(x_n)[/tex]until we reach an accurate solution. In this case, the solutions are approximately x ≈ 0.84185 and x ≈ 2.725.
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The solutions to the systems of equations graphically are (2, -2) and (1.52, -1.42)
Solving the systems of equations graphicallyFrom the question, we have the following parameters that can be used in our computation:
x³ - 3x + 2 = 0.1 - x
When splitted, we have
y = x³ - 3x² + 2
y = 0.1 - x
Next, we plot the graph of the system of the equations
See attachment for the graph
From the graph, we have solution to the system to be the point of intersection of the lines
These points are located at (2, -2) and (1.52, -1.42)
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What us the length of the altitude of the equilateral triangle below
Answer:
Height ( h) = 12 units.
Step-by-step explanation:
Given : An equilateral triangle with side = 8 √3.
To find : What us the length of the altitude of the equilateral triangle .
Solution : We have given equilateral triangle with side = 8 √3.
By taking the half triangle,
By the Pythagorean theorem :
(Hypotenuse)² = ( adjacent)² + (opposite)².
Plug the values Hypotenuse = 8√3 , adjacent = 4√3 , opposite = h.
(8√3)² = ( 4√3)² + (h)².
192 = 48 + (h)².
On subtracting by 48 both sides.
192 -48 = (h)².
144 = (h)².
On taking square root .
h = 12 .
Therefore, Height ( h) = 12 units.
The guy is right trust me mate
Which equation shows how (10, 8) can be used to write the equation of this line in point-slope form?
Answer:
y - 8 = m(x - 10). (h, k)
Step-by-step explanation:
If the slope is m, then the desired equation is y - 8 = m(x - 10). (h, k) represents the given point, which here is (10, 8).
Next time, won't you please share the answer choices?
Answer: y - 8 + 10x
ep-by-step explanation:
i go to school on the 4th of June Monday and i summer term is on 29th June i have 3 days a week at school Monday Tuesday Wednesday
how meany of my schooldays are left
11 school days are left.
In the attached picture of a calendar, I marked the days the person has left. There are 11.
Let f(x)=14/ 7+2e^−0.6x .
What is f(3) ?
Answer:
[tex]f(3)=1.9[/tex]
Step-by-step explanation:
we have
[tex]f(x)=\frac{14}{7+2e^{-0.6x}}[/tex]
we know that
f(3) is the value of the function for the value of x equal to 3
so
substitute the value of x=3 in the function
[tex]f(3)=\frac{14}{7+2e^{-0.6(3)}}=1.9[/tex]
DO,h = (7,9) —> (14,18) the scale factor is ____.
Answer:
option B
2
Step-by-step explanation:
Given in the question
DO,h(7, 9) → (14, 18)
Formula to use
√(x1-x2)²+(y1-y2)²distance formula = √((7-0)²+(9-0)²) = √(7²+9²) = √130
distance formula = √((14-0)²+(18-0)²) = √(14²+18²) = 2√130
Scale factor
√130 = 2√130
d = 2d
the expression -5t^2+ 40t predicts the height, in meters, of an object t seconds after a person launches it into the air. how many seconds will it take the object to hit the ground?
Answer:
8 seconds
Step-by-step explanation:
Set the equation equal to 0. You do this because h(0) means that there is no height of the object, and that then implies that the object is on the ground (where there is no height). Then factor using the quadratic formula:
[tex]0=-5t^2+40t[/tex]
Factor out the common constant and variable between the terms:
[tex]0=-5t(t-8)[/tex]
Solving for t, you get that t = 0 and t = 8. The t = 0 is indicative of the fact that at zero seconds (in other words before the object was launched) it was still on the ground. At t = 8, it had completed its parabolic travels and landed on the ground again.
The object launched in the air described by the quadratic equation [tex]-5t^2 + 40t[/tex] will hit the ground after 8 seconds. This is found by solving the quadratic equation [tex]0 = -5t^2 + 40t[/tex] for t.
The expression [tex]-5t^2 + 40t[/tex] predicts the height of an object at a given time after it is launched into the air. To find out when the object will hit the ground, we set the height to zero and solve for t. This results in a quadratic equation that we need to solve:
[tex]0 = -5t^2 + 40t[/tex]
Dividing each term by -5 to simplify, we get:
[tex]t^2 - 8t = 0[/tex]
We can factor this to:
t(t - 8) = 0
Setting each factor equal to zero gives us two solutions, t = 0 and t = 8. The solution t = 0 represents the object at launch. The solution t = 8 seconds represents the time when the object hits the ground.
a touchdown in football counts for 6 points if n stands for the number of touchdowns, which equation represents how many points n touchdowns are worth
Answer:
6n
Step-by-step explanation:
Subject Algebra 1
If [tex]y=3x^{2} + x^{2} -5[/tex] and [tex]z=x^{2} -12[/tex] which polynomial is equivalent to [tex]2(y+z)[/tex]?
Answer:
[tex]10x^{2}-34[/tex]
Step-by-step explanation:
Because we are told equivalent expressions for y and z we can plug those in to 2(y+z).
[tex]2((3x^{2}+x^{2}-5)+(x^{2}-12))[/tex]
Then simplify by combining like terms of the expressions. Values ending in x^2 can be combined with each other.
[tex]2(5x^{2}-17)[/tex]
Now we can distribute the 2 by multiplying each value in the parentheses by 2.
[tex]10x^{2}-34[/tex]
PLEASE HELP!!
Which scale factors produce an expansion under a dilation of he original image?
Choose all answers that are correct
a)-2
b)-1/2
c)1/2
d)2
Under the dilation, the point (3,5) is moved to (6,10)
What is the scale factor of the dilation?
For dilation's, you can ignore any negative signs.
An expansion would be a number greater than 1.
The correct answers would be a and b
The numbers double: 3 x 2 = 6, 5 x 2 = 10, so the scale factor is 2.
Solve the system of equations.
y=x−5 y=x^2−2x−9
Enter your answers in the boxes.
( , ) or ( , )
sub the first equation into the next one
Find the cosine of angle p
Answer: last option
Step-by-step explanation:
You need to remember the identity:
[tex]cos\alpha=\frac{adjacent}{hypotenuse}[/tex]
You need to find the cosine of angle P, then, you can identify in the figure that:
[tex]adjacent=PR=21\\hypotenuse=PQ=29\\\alpha=P[/tex]
Therefore, the next step is substitute these values into [tex]cos\alpha=\frac{adjacent}{hypotenuse}[/tex], then you get:
[tex]cos(P)=\frac{21}{29}[/tex]
You can observe that this matches with the last option.
A road crew must repave a rode that is 2/5 miles long. They can repave 1/30 miles each hour. How long will it take the crew to repave the road?
It would take 12 hours.
the equation would be 2/5=1/30x where x would equal the amount of hours it would take
Which of the following are possible rational roots of the polynomial function f(x)=5x^2-3x+3
You didn't post any option, but the ration roots theorem states that all possible rational roots of a polynomial come in the form
[tex]\pm\dfrac{p}{q}[/tex]
where p divides the constant term and q divides the leading term of the polynomial. So, in your case, p divides 3 (i.e. it is 1 or 3), and q divides 5 (i.e. it is 1 or 5).
So, the possible roots are
[tex]\pm 1,\quad \pm 3,\quad \pm\dfrac{1}{5},\quad \pm\dfrac{3}{5}[/tex]
For the record, this parabola has no real roots.
The possible rational roots of the polynomial function f(x) = 5x² - 3x + 3 are;
±1/5, ±3/5, ±1, ±3
We are given the polynomial function;
f(x) = 5x² - 3x + 3
The rational root theorem states that for a polynomial to have any rational roots, then the roots must be of the form;
±(Factors of coefficient of constant term/factors of the coefficient of the highest power)
Now, the coefficient of the highest power is 5 and the constant term is 3.
Factors of 5 = 1, 5
Factors of 3 = 1, 3
Thus, the possible rational roots are;
±1/5, ±3/5, ±1, ±3
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NEEED HELP PLLZZZZZZ
Answer:
4
Step-by-step explanation:
In a 30-60-90 triangle, the short leg is half the length of the hypotenuse.
Please help me out with this
Answer:
[tex]\frac{9}{64}[/tex] π in²
Step-by-step explanation:
The area (A) of the circle is calculated using the formula
A = πr² ← r is the radius
here the diameter = [tex]\frac{3}{4}[/tex]
and radius is half the diameter, hence
r = [tex]\frac{3}{8}[/tex], so
A = π × ([tex]\frac{3}{8}[/tex] )² = [tex]\frac{9}{64}[/tex] π in²
Find the missing lengths of the sides.
Answer:
b = 8√3 and c = 16
Step-by-step explanation:
Points to remember
If the angles of a right angled triangle with angles are 30°, 60, and 90 the their sides are in the ratio 1 : √3 : 2
To find the unknown side lengths
From the given figure we can see a right angled triangle
Angles are 30°, 60° and 90°
sides are in the ratio 1 : √3 : 2
1 : √3 : 2 = 8 : b : c
b = 8√3 and c = 8 * 2 = 16
Therefore b = 8√3 and c = 16
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
The graph of the function f(x) = x^3 – 7x – 6 intersects the x-axis at the points (–2, 0), (–1, 0), and (3, 0) as shown.
Which expression is equivalent to x^3 – 7x – 6?
The answer is D, (x + 1) (x + 2) (x - 3)
Answer: D) (x + 1))x + 2)(x - 3)
Step-by-step explanation:
The x-intercepts help us to form the equation of the curve:
(-2, 0) (-1, 0) and (3, 0)
--> x = -2, x = -1, x = 3
--> x + 2 = 0 x + 1 = 0 x - 3 = 0
--> (x + 2) × (x + 1) × (x - 3) = 0
This is the reverse order for the Zero Product Property